สอบถามหน่อยค่ะ ว่าหากจะ set selecteditem in DataGridViewComboBoxCell c# ต้องทำยังไงคะ

DataGridViewComboBoxColumn colType = new DataGridViewComboBoxColumn();
            colType.HeaderText = "colType";
            colType.MaxDropDownItems = 3;
            colType.Items.AddRange("A", "B", "C");
            this.DataGridView1.Columns.Insert(11,colType);
            this.DataGridView1.Columns[11].DataPropertyName = "trans_type";

            foreach (DataGridViewRow row in DataGridView1.Rows)
            {
                if (row.Cells["TripType"].Value.ToString() == "0")
                {
                    DataGridViewComboBoxCell cbCell = (DataGridViewComboBoxCell)row.Cells["colType"];
                    cbCell.Value = 0;
                    
                }
                
            }